GB838809A - Improvements in or relating to magnetic switching circuits - Google Patents
Improvements in or relating to magnetic switching circuitsInfo
- Publication number
- GB838809A GB838809A GB3320858A GB3320858A GB838809A GB 838809 A GB838809 A GB 838809A GB 3320858 A GB3320858 A GB 3320858A GB 3320858 A GB3320858 A GB 3320858A GB 838809 A GB838809 A GB 838809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cores
- output
- input
- show
- windings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/003—Modifications for increasing the reliability for protection
- H03K19/00392—Modifications for increasing the reliability for protection by circuit redundancy
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/16—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using saturable magnetic devices
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
838,809. Magnetic gating circuits. STANDARD TELEPHONES & CABLES Ltd. Oct. 17, 1958, No. 33208/58. Class 40 (9). A gating circuit which will produce an output indicating the presence of a number of input signals comprises x input windings each wound on a different combination of z cores, x output windings each wound on a different combination of cores, and each core having unique combinations of y input and y output windings. The number of cores equals the number of choices of y out of x. As shown in Fig. 3, three input signals at terminals 31, 32 and 33 hold cores 21, 22 and 23 saturated. Withdrawal of one signal does not affect the saturation of the cores as each core is saturated from two of the signal sources. Withdrawal of two signals will desaturate one core and as this is associated with two output windings two of the terminals 41, 42 and 43 will show a high impedance. Withdrawal of all signals will desaturate all cores and all output circuits will show a high impedance. Input and output circuits are shown in Fig. 4, the input windings being energized over normallymade contacts S1, S2 and S3, and the output windings being energized in parallel from an A.C. source. Transformers T1, T2, T3, normally extract sufficient voltage to break down the voltage thresholds of rectifier bridges MR1, MR2, MR3. When two or three contacts S1, S2, S3 are open two or three of the output circuits show high impedance and the associated rectifier bridges cut off, causing indicators I1, I2, I3 to operate. The transformers T1, T2, T3 may be connected in common in a series connection of a number of output circuits each in a separate gating circuit, such as shown in Fig. 3, with separate sets of contacts S1, S2, and S3, see Fig. 6, not shown. In this arrangement the indicators I1, I2 and I3 will show that one of the gating circuits has two or three contacts open but will not show which gating circuit is concerned.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3320858A GB838809A (en) | 1958-10-17 | 1958-10-17 | Improvements in or relating to magnetic switching circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3320858A GB838809A (en) | 1958-10-17 | 1958-10-17 | Improvements in or relating to magnetic switching circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB838809A true GB838809A (en) | 1960-06-22 |
Family
ID=10349965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3320858A Expired GB838809A (en) | 1958-10-17 | 1958-10-17 | Improvements in or relating to magnetic switching circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB838809A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518288A1 (en) * | 1981-12-11 | 1983-06-17 | Commissariat Energie Atomique | DEVICE FOR RELEASING A SAFETY ACTUATOR |
EP0266811A1 (en) * | 1986-10-21 | 1988-05-11 | HCS Industrial Safeguarding B.V. | Logic voting-circuit |
-
1958
- 1958-10-17 GB GB3320858A patent/GB838809A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518288A1 (en) * | 1981-12-11 | 1983-06-17 | Commissariat Energie Atomique | DEVICE FOR RELEASING A SAFETY ACTUATOR |
EP0082065A1 (en) * | 1981-12-11 | 1983-06-22 | Commissariat à l'Energie Atomique | Triggering device for a safety activator |
US4587077A (en) * | 1981-12-11 | 1986-05-06 | Commissariat A L'energie Atomique | Safety actuator release device |
EP0266811A1 (en) * | 1986-10-21 | 1988-05-11 | HCS Industrial Safeguarding B.V. | Logic voting-circuit |
US4789795A (en) * | 1986-10-21 | 1988-12-06 | Hcs Industrial Safeguarding B.V. | Logic voting-circuit |
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